Furnace



J. REID March 9 1926.

FURNACE Filed May 10 1924 Jaw Bea Patented Mar. 9, 1926.

UNITED ST'I'S JOHN REID, OF LONDON, ENGLAND.

FURNACE.

Application filed May 10, 1924.

To all whom it may concern:

Be it known that I, JoI-IN REID, a subject of the King of Great Britainand Ireland, residing at London, England, have invented ImprovementsRelating to Furnaces, of which the following is a specification.

In the distribution of air to furnaces it frequently happens,particularly in forced draft furnaces, that streams of air meet in thefurnace front and obstruct the even flow of the air into the furnace,results being that the air has to be subjected to greater pressure thanis really necessary and that surges and eddies are set up and the flameunevenly supplied with air which however reaches it at high velocity;under these conditions eflicient and economical combustion cannot beattained.

The object of the present invention is to overcome these disadvantages,more especially in forced or mechanical draft furnaces burning liquidfuel.

According to the invention, the air is admitted to a circular air pocketin the furnace front and is gradually diverted by an irregular orceratoid cusp shaped plate so as to flow in the desired direction, forinstance in the case of an oil burning furnace, spirally around theinterior of a cylinder, part of the wall of which is cut away to admitthe stream of air. This cylinder is mounted in the front opposite theopening into the furnace and the burner tubesurrounded, it may be, by aperforated or slotted air distributing sleeve, extends through it. Someof the air may also flow around the exterior of the cylinder whichitself may be perforated or slotted. The ceratoid cusp shaped plate maybe adjustable within the furnace front, and may be secured to the flareor the ashpit door.

In the accompanying drawings the invention is illustrated as embodied ina sectional front for a furnace convertible for burning either coal oroil, the front being shown fitted for burning oil, but it is to beunderstood that the invention may be embodied in other forms of furnacefronts.

Fig. 1 is a vertical longitudinal section through the front and Fig. 2 afront elevation partly in section.

a and b are the front and back plates of the front each being formedwith projecting portions which meet and form the flare c and the fuelcasing or firebox (Z, the bottom Serial No. 712,382.

of which is closed by a removable sill when coal is being burned; e isan air casing with regulating air valve 7 and g, g are valves admittingair to the lower part of the air pocket within the front. Thisconstruction is well known. I

To the flare 0 a ceratoid cusp shaped plate 72, is removably secured ina position to the right of the centre line of the front so that airentering by the left hand valve g will be gradually diverted upwardlyinto the fuel casing or firebox (Z which is fitted with a removable airguide or cylinder z' the lower part of which is cut away as shown. Theoil burner tube 7: extends through the air guide or cylinder 2' and theair flows spirally around it and through the opening Z in the fire brickpartition m which closes the mouth of the furnace. The plate It may beextended to the partition m.

Usually only the left hand valve 9 will be open but if the right handvalve g is also open the air admitted therethrough will also be divertedin a similar, though less gradual manner by the other side of the cuspshaped plate h, the two streams thus being blended smoothly into astream which enters and flows spirally around the interior of thecylinder 2'.

In the case of a multiple furnace steam boiler, the wing furnaces may befitted with ceratoid cusp shaped plates set respectively to the lefthand (as shown) and right hand of the centre line of the front.

What I claim is 2- 1. In a furnace front having a circular air pockettherein, a ceratoid cusp shaped device adapted to gradually divert airadmitted thereto from either side of said device so that it flows inthedesired direction to said pocket, substantialy as described.

2. In a furnace front, the combination of a ceratoid cusp shaped plateadapted to gradually divert air admitted thereto of a partial cylinderinto which the stream of air is diverted and around the interior ofwhich it flows spirally to the opening into the furnace, substantiallyas described.

3. The combination with a furnace front having laterally disposed airinlet openings and a rear outlet to the furnace, a ceratoid cusp-shapedplate located within the front so as to present concave surfaces to theflow of air and gradually divert the air towards the outlet from thefront to the furnace.

a. In combination with a furnace front l fl:

6. In combination with a furnace Front having laterally disposed airinlet open ings, a cera'toid cusp-shaped plate located within the frontso as to present concave surfaces to the low of air on opposite sides ofsaid front and gradually divert the air in opposing streams untilblended in a common stream; each of said concave surfaces being in theform of the segment of a circle and one of the circles described by thesegments being of larger d1ameter than the other.

Signed at New York c1.ty,N. Y., U. ti. it, this 9 day 0'] lllay, 1924. I

JOHN REID.

